Application: plasma-desktop (4.10.5)
KDE Platform Version: 4.10.5
Qt Version: 4.8.4
Operating System: Linux 3.11.0-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
- What I was doing when the application crashed:

I closed Amarok, the desktop became sluggish, then plasma-desktop crashed. It may be worth noting that I use the appmenu bar in plasma which was mentioned in related reports.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f24e4e16780 (LWP 7826))]

Thread 6 (Thread 0x7f24e074d700 (LWP 7838)):
#0  0x0000003b16adcfad in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x000000394c88708f in read (__nbytes=16, __buf=0x7f24e074cc10, __fd=<optimized out>) at /usr/include/bits/unistd.h:45
#2  g_wakeup_acknowledge (wakeup=0x7f24d8001c30) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gwakeup.c:212
#3  0x000000394c84a504 in g_main_context_check (context=0x7f24d80028e0, max_priority=2147483647, fds=0x7f24d8002bb0, n_fds=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3502
#4  0x000000394c84a949 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f24d80028e0, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3698
#5  g_main_context_iterate (context=0x7f24d80028e0, block=<optimized out>, dispatch=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3638
#6  0x000000394c84aac4 in g_main_context_iteration (context=0x7f24d80028e0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3762
#7  0x000000394e9b1176 in QEventDispatcherGlib::processEvents (this=0x7f24d8002800, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#8  0x000000394e980d62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#9  0x000000394e980fb7 in QEventLoop::exec (this=0x7f24e074cdb0, flags=...) at kernel/qeventloop.cpp:204
#10 0x000000394e87f017 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#11 0x000000394e9609ef in QInotifyFileSystemWatcherEngine::run (this=0x441ddf0) at io/qfilesystemwatcher_inotify.cpp:256
#12 0x000000394e88205c in QThreadPrivate::start (arg=0x441ddf0) at thread/qthread_unix.cpp:338
#13 0x0000003b17208ec6 in start_thread (arg=0x7f24e074d700) at pthread_create.c:305
#14 0x0000003b16aea6ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 5 (Thread 0x7f24cf7c1700 (LWP 7839)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x0000003959187862 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x395947fe60 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x0000003959187899 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003b17208ec6 in start_thread (arg=0x7f24cf7c1700) at pthread_create.c:305
#4  0x0000003b16aea6ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7f244acc1700 (LWP 7841)):
#0  0x0000003b16adcfad in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x000000394c88708f in read (__nbytes=16, __buf=0x7f244acc0d60, __fd=<optimized out>) at /usr/include/bits/unistd.h:45
#2  g_wakeup_acknowledge (wakeup=0x7f2444001780) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gwakeup.c:212
#3  0x000000394c84a504 in g_main_context_check (context=0x7f244400cd40, max_priority=2147483647, fds=0x7f243c0010c0, n_fds=3) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3502
#4  0x000000394c84a949 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f244400cd40, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3698
#5  g_main_context_iterate (context=0x7f244400cd40, block=<optimized out>, dispatch=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3638
#6  0x000000394c84ae3a in g_main_loop_run (loop=0x7f244400d330) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3895
#7  0x000000394d4d1b26 in gdbus_shared_thread_func (user_data=0x7f244400d370) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/gio/gdbusprivate.c:278
#8  0x000000394c86c915 in g_thread_proxy (data=0x7f2444004370) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gthread.c:798
#9  0x0000003b17208ec6 in start_thread (arg=0x7f244acc1700) at pthread_create.c:305
#10 0x0000003b16aea6ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7f2442f13700 (LWP 7842)):
#0  0x0000003b16ae1ad3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x000000394c84a9a6 in g_main_context_poll (n_fds=1, fds=0x7f2438004340, timeout=624307, context=0x7f24380009a0, priority=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3995
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f24380009a0, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3696
#3  g_main_context_iterate (context=0x7f24380009a0, block=<optimized out>, dispatch=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3638
#4  0x000000394c84aac4 in g_main_context_iteration (context=0x7f24380009a0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3762
#5  0x000000394e9b1176 in QEventDispatcherGlib::processEvents (this=0x7f24380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x000000394e980d62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x000000394e980fb7 in QEventLoop::exec (this=0x7f2442f12da0, flags=...) at kernel/qeventloop.cpp:204
#8  0x000000394e87f017 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f24435aebc5 in KCupsConnection::run (this=0x4f1bff0) at /var/tmp/portage/kde-base/print-manager-4.10.5/work/print-manager-4.10.5/libkcups/KCupsConnection.cpp:310
#10 0x000000394e88205c in QThreadPrivate::start (arg=0x4f1bff0) at thread/qthread_unix.cpp:338
#11 0x0000003b17208ec6 in start_thread (arg=0x7f2442f13700) at pthread_create.c:305
#12 0x0000003b16aea6ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f24415d0700 (LWP 6870)):
#0  0x0000003b1720c07f in __pthread_mutex_unlock_usercnt (mutex=0x7f24340027a0, decr=0) at pthread_mutex_unlock.c:52
#1  0x000000394c887f91 in g_mutex_unlock (mutex=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gthread-posix.c:229
#2  0x000000394c84a2fb in g_main_context_query (context=0x7f24340026e0, max_priority=2147483647, timeout=0x7f24415cfcac, fds=<optimized out>, n_fds=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3462
#3  0x000000394c84a91d in g_main_context_iterate (dispatch=1, block=1, context=0x7f24340026e0, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3683
#4  g_main_context_iterate (context=0x7f24340026e0, block=1, dispatch=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3638
#5  0x000000394c84aac4 in g_main_context_iteration (context=0x7f24340026e0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3762
#6  0x000000394e9b1176 in QEventDispatcherGlib::processEvents (this=0x7f2434002600, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x000000394e980d62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x000000394e980fb7 in QEventLoop::exec (this=0x7f24415cfdc0, flags=...) at kernel/qeventloop.cpp:204
#9  0x000000394e87f017 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#10 0x000000379550b56f in QDeclarativePixmapReader::run (this=0x58cf5f0) at util/qdeclarativepixmapcache.cpp:576
#11 0x000000394e88205c in QThreadPrivate::start (arg=0x58cf5f0) at thread/qthread_unix.cpp:338
#12 0x0000003b17208ec6 in start_thread (arg=0x7f24415d0700) at pthread_create.c:305
#13 0x0000003b16aea6ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f24e4e16780 (LWP 7826)):
[KCrash Handler]
#6  0x000000394e998550 in QMetaObject::changeGuard (ptr=0x5de3eb0, o=0x5830510) at kernel/qobject.cpp:445
#7  0x000000378dbde4fa in operator= (p=<optimized out>, this=0x5de3eb0) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#8  QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent (this=0x5de3cd0, event=0x7fff83b3d650) at graphicsview/qgraphicsproxywidget.cpp:284
#9  0x000000378dbc0cf1 in QGraphicsItem::sceneEvent (this=0x366c2a0, event=0x7fff83b3d650) at graphicsview/qgraphicsitem.cpp:6742
#10 0x000000378dbe9904 in QGraphicsScenePrivate::sendMouseEvent (this=0x22b37e0, mouseEvent=0x7fff83b3d650) at graphicsview/qgraphicsscene.cpp:1295
#11 0x000000378dbea3c5 in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fff83b3d650) at graphicsview/qgraphicsscene.cpp:4128
#12 0x000000378dbf87ef in QGraphicsScene::event (this=0x219f0f0, event=0x7fff83b3d650) at graphicsview/qgraphicsscene.cpp:3458
#13 0x000000378d5de1e4 in notify_helper (e=0x7fff83b3d650, receiver=0x219f0f0, this=0x2205ef0) at kernel/qapplication.cpp:4562
#14 QApplicationPrivate::notify_helper (this=0x2205ef0, receiver=0x219f0f0, e=0x7fff83b3d650) at kernel/qapplication.cpp:4534
#15 0x000000378d5e2f01 in QApplication::notify (this=0x2202390, receiver=0x219f0f0, e=0x7fff83b3d650) at kernel/qapplication.cpp:3944
#16 0x000000378e861856 in KApplication::notify (this=0x2202390, receiver=0x219f0f0, event=0x7fff83b3d650) at /var/tmp/portage/kde-base/kdelibs-4.10.5-r1/work/kdelibs-4.10.5/kdeui/kernel/kapplication.cpp:311
#17 0x000000394e98220c in QCoreApplication::notifyInternal (this=0x2202390, receiver=0x219f0f0, event=0x7fff83b3d650) at kernel/qcoreapplication.cpp:946
#18 0x000000378dc13e9f in QGraphicsView::mouseReleaseEvent (this=0x587c710, event=0x7fff83b3e250) at graphicsview/qgraphicsview.cpp:3338
#19 0x000000378d62ee82 in QWidget::event (this=0x587c710, event=0x7fff83b3e250) at kernel/qwidget.cpp:8375
#20 0x000000378d9ebc66 in QFrame::event (this=0x587c710, e=0x7fff83b3e250) at widgets/qframe.cpp:557
#21 0x000000378dc16c5b in QGraphicsView::viewportEvent (this=0x587c710, event=0x7fff83b3e250) at graphicsview/qgraphicsview.cpp:2866
#22 0x000000394e982386 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x30d5c90, event=0x7fff83b3e250) at kernel/qcoreapplication.cpp:1056
#23 0x000000378d5de1af in notify_helper (e=0x7fff83b3e250, receiver=0x30d5c90, this=0x2205ef0) at kernel/qapplication.cpp:4558
#24 QApplicationPrivate::notify_helper (this=0x2205ef0, receiver=0x30d5c90, e=0x7fff83b3e250) at kernel/qapplication.cpp:4534
#25 0x000000378d5e3919 in QApplication::notify (this=<optimized out>, receiver=0x30d5c90, e=0x7fff83b3e250) at kernel/qapplication.cpp:4105
#26 0x000000378e861856 in KApplication::notify (this=0x2202390, receiver=0x30d5c90, event=0x7fff83b3e250) at /var/tmp/portage/kde-base/kdelibs-4.10.5-r1/work/kdelibs-4.10.5/kdeui/kernel/kapplication.cpp:311
#27 0x000000394e98220c in QCoreApplication::notifyInternal (this=0x2202390, receiver=0x30d5c90, event=0x7fff83b3e250) at kernel/qcoreapplication.cpp:946
#28 0x000000378d5df1a2 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QApplicationPrivate::sendMouseEvent (receiver=0x30d5c90, event=0x7fff83b3e250, alienWidget=0x30d5c90, nativeWidget=0x587c710, buttonDown=0x30d5c90, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3173
#30 0x000000378d65b1c8 in QETWidget::translateMouseEvent (this=0x587c710, event=<optimized out>) at kernel/qapplication_x11.cpp:4516
#31 0x000000378d659fda in QApplication::x11ProcessEvent (this=0x2202390, event=0x7fff83b3e970) at kernel/qapplication_x11.cpp:3639
#32 0x000000378d681a9a in x11EventSourceDispatch (s=0x21f2640, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x000000394c84a6c3 in g_main_dispatch (context=0x2206230) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3054
#34 g_main_context_dispatch (context=0x2206230) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3630
#35 0x000000394c84aa08 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x2206230, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3701
#36 g_main_context_iterate (context=0x2206230, block=<optimized out>, dispatch=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3638
#37 0x000000394c84aac4 in g_main_context_iteration (context=0x2206230, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.3-r2/work/glib-2.36.3/glib/gmain.c:3762
#38 0x000000394e9b110f in QEventDispatcherGlib::processEvents (this=0x2135ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#39 0x000000378d68173e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#40 0x000000394e980d62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#41 0x000000394e980fb7 in QEventLoop::exec (this=0x7fff83b3ed00, flags=...) at kernel/qeventloop.cpp:204
#42 0x000000394e985d85 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#43 0x00007f24e571250f in kdemain (argc=1, argv=0x7fff83b3f0e8) at /var/tmp/portage/kde-base/plasma-workspace-4.10.5-r2/work/plasma-workspace-4.10.5/plasma/desktop/shell/main.cpp:126
#44 0x0000003b16a2460d in __libc_start_main (main=0x400780 <main(int, char**)>, argc=1, ubp_av=0x7fff83b3f0e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff83b3f0d8) at libc-start.c:226
#45 0x00000000004007b1 in _start ()

Possible duplicates by query: bug 323956, bug 319031, bug 316992, bug 313431, bug 308852.

Reported using DrKonqi